The charring
The phase carbonization can be decisive in the manufacture of charcoal, although this is not the most expensive. Unless it is completed as efficiently as possible, you can create a risk to the operation's overall coal production, since the low yields in the charred impact all along the production chain, in the form of higher costs and waste of resources.

The wood consists of three main components: cellulose, lignin and water. The cellulose, lignin and some other materials are strongly linked with each other and constitute the material called timber. Water is absorbed or retained as water molecules in the structure cellulose / lignin. The air-dried wood or "parked" still contains 12-18% of water absorbed. The wood growth, recently cut or "No Parking", also contains liquid water, bringing the total content of water at about 40-100%, expressed as a percentage of the weight of dry wood in the oven.

Before the carbonization occurs, the water in the wood must be totally eliminated as a vapor. It takes a lot of energy to evaporate water, so if used as much as possible in the sun for the pre-wood before carbonization, it greatly improves efficiency. Water left in the wood has to be charred, must be evaporated or in the pit or in the oven, and this energy must be supplied by burning part of the same wood, which could instead be turned into charcoal profitable.